If Maria Khachaturyan and her sisters are convicted they could be caged for up to 15 years

Friends and neighbours claimed the father was tyrannical and his wife - the sisters’ mum - fled because of his abuse.

One family friend said she knew that at least one girl had been “sexually abused”.

She said: “He was always beating them. Once he took them to a forest and threatened to kill them.

“The mother ran away from him, he banned all communication with her.

“The father was linked to the criminal world, he was a kind of mafia boss.”

Online news channel 112 reported it had evidence that one of the sisters told in correspondence how Khachaturyan forced her to perform a sex act on him while news site Mash cited an anonymous friend saying he was “constantly seducing” his daughters.

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He was reportedly recorded on audio tape threatening his daughters: “You will suck all the time if you don’t go away.

“And if you go away, I will find you, you whores.”

“If you just take a risk… your mother did not take a risk. I will f*** you and you will regret it. You won’t have time to regret.

“I will beat you for all, I will kill you. Go away, go away, don’t push me to sin.”

TASS news agency reported police spokeswoman Yulia Ivanova saying: “During the interrogation, all the girls confessed their guilt and explained that they had hostile relations with their father due to the moral sufferings he had inflicted on them over a long period.”

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